A guide device for TMJ arthroscopy including one or more pairs of arms pivotly connected at one end to a working cannula holder and defining a working cannula axis; and at the opposite end to at one or more arms via one or more pivot connections to form with the arm one or more adjustable parallelograms, an end of the arm is connected to an irrigation cannula holder defining an irrigation cannula axis, the irrigation cannula axis intersecting with the working cannula axis at an intersection, intersection and one or more of the pivot connections between connecting the arms are located at opposing vertices of one or more of the adjustable parallelograms.